HK and lots of other Asia subways got barrier that only opens when train is already in position and opens RIGHT in front of the lines for waiting passengers to get ready for boarding. The arriving passengers exit from the middle. Never any people falling into the subway.
Here TO and NYC for sure do not have any barrier and annual fatalities is like one per month accident or not (suicide).
How hard is it for N. American cities to do what Asian cities already did ? ? ?